Friction-pulley



(No Model.)

E. W. RHONE.

PRIGTION PULLBY.

No. 386,719. Patented July 24, 1888..

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WITNESSES.-

N. PETERS. Pmwmhc'gnpm, wn-hinmm-D. c

UNrrnn Sierras Fernse @Fries EZB-A VESIJEY RHONE, OF .VILCOK,PENNSYLVANIA.

FRlCTlGii=-PULLE.Y.

SPECIFICATION forming part of Letters Patent No. 386,719, dated July 24,1888.

(No model.)

,To @ZZ whom t may concern:

Be it known that l, FZRA WnsLnY RHONE, a citizen of the United States,and a resident of Vileox, inthe countyof Elk andState of Penn Sylvania,have invented certain new and useful Improvements in Friction-Pulleys;and I do hereby declare that the following is a full, clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use thesame, reference being hadto the accompanying drawings, which form a part of this specification,and in which- Figure l is a perspective view of my new and improvedfrietionpullcy, taken from the outer side of the bandpulley. Fig. 2 isacentral vertical sectional view of the same. Fig. 3 is a perspectit'eview of the fixed pulley,taken from the inner side thereof. Fig. et isavertical sectional view taken on the plane indicated by line .t a' ofFig. 2, and Fig. 5 is a detail view ofthe grooved collar with itsIlangeplate.

The same letters of reference indicate corresponding parts in all thefigures.

My invention eonsistsin a new and improved friction-pulley, which willbe hereinafter fully described and claimed.

Referring to the several parts by letter, A indicates acontinuouslyrevolving shaft, upon which my invention is shown as mountedin operative position.

B indicates the fixed pulley, which is secured upon the shaft A, so asto revolve continuously therewith, by means of a screw, u, or by a key,in the usual manner. rllhis wheel or fixed pulley is formed with thelong central hub, C, which projects along the shaft A from the innerside-of the pulley, as shown in the seetional view Fig. 2 of thedrawings, and with the radial spokes D and the outer inwardlyprojectingperiphery or rim, E, the inner side of which rim may be straight; butits outer side is beveled or inclined inwardly, as shown in thesectional view Fig. 2 of the drawings, this inclination being preferablyabout one fourth of an inch to an inch in width, for the reasonhereinafter specified. This fixed pulley has formed or cast on its innerside an annular iiange or ring, F, the inner edge, G, of which proj eetsin, forming an annular shoulder, which is beveled on both sides, asshown in Fig. 2.. The rim E of this fixed pulley is formed with threeopenings, I-I H Il, of suit^ able size and placed equidistant from eaehother. To the inner side of this rim of the pulley are secured to eachside of each 0f the said openings springs I I, one on each side of eachopening. The free adjacent ends J J of each pair of springs are bent inat right angles to each other, and between these inwardly-bent freeends, which are formed with the longitudinal slots K K, is securedadjustably a wooden friction-block, L, the outer end of which projectsthrough that opening Il in the rim ofthe pulley. This projecting outerend ol' each of the said three friction-blocks is slightly curved toconform to the curvature of the pulley-rim, and the blocks are held inposition adjustably by means of a bolt or screw, M, which passes throughthe longitudinal slots K K and through the Wooden block. By formingtliefree parallel ends of the pairs of' springs with these longitudinalslots, through which the securing bolt or screw passes, it will be seenthat as the wooden friction-blocks become worn in use by friction theycan be adjusted outward to take up wear.

N indicates aslecve, which is mounted upon the shaft A at the inner endofthe hub ofthe fixed pulley,theinner end ofthissleeve being ineloseproximity to the inner end ofthefixed pulley-hub. A ring, O,issecured by a set-screw, P, upon the shalt A at the outer end of thissleeve N, and serves to hold this sleeve in position in the shaft andprevent its slipping thereon. \Vithin the upper side of the outer endportion of this sleeve Nis a small oil-cup, Q, of ordinary construction,which communicates through an aperture, t, in the sleeve N with theinterior of the said sleeve, and thus lubrieates the shaft A not onlyinside of the sleeve N, but the oil will also run along the shaft withinthe sleeve N until it reaches the inner end ofthe hub of the fixedpulley, when it will lubricate the bearing of the inner end of the hubof the movable or belt pulley.

S indicates the loose pulley or belt-pulley. The hub 'il of this pulleyfits upon the sleeve N, upon which itslides when thrown into or out ofadjustment, and this pulley is formed, like the fixed pulley, with thespokes U, and is also formed with the rim or periphery V.

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u already be in full motion.

The inner projecting part of this rim V is about twice the widthof theinwardly-projecting rim of the fixed pulley, and, while the outer sideofthe rim of this movable pulleyis nearly straight, the inner sidethereof is bcveled, inclined outward, the pitch of thisinclination beingabout one-fourth of au inch to the inch of width. The object ofgivingsuch asharp pitch or inclination to the meeting faces of the rims of thefixed and moving pulleys is to enable thepulleys to be brought togetheror moved apart out of frictional contact without having to move thesliding band-pulley S too far to one side, as will be readilyunderstood.

The shaft A revolves continuously,carrying -with it the fixed pulley B,while the band-pulley S, when shifted to the side out ofengagen1ent,will stand still,the sleeve N also rein-ain ing stationary,the shaft A turning within it. Now, when the band-pulley is moved intoward the fixed pulley the inner inclined side of itsinwardly-projecting rim will first come into contact with the projectingouter ends of the wooden friction-blocks, which, as before stated,project through the openings K in the rim of the fixed pulley'. As therim of the band-pulley comes into vcontact with the outer ends of thesespring-actuated wooden blocks, the said blocks will yield sufficientlyto effectually prevent any jar or shock in starting, the band wheel orpulley being gradually started by these wooden blocks, so that when itsbeveled rim comes in Contact with the beveled rim of the iixed pulleythe band-pulley will As the rim ofthe band-pulley is forced over the rimofthe fixed pulley, the wooden blocks are forced in until the beveledsurfaces of the rims of the two pulleys are fully in contact, and bysecuring the said blocks to and between the ends ot' the pairs ofsprings the blocks when forced in will recede directly toward the centerof the iixed wheel,'so that the full surface of their outer ends willalways be exposed to the outer rimthe rim of the band-pulley. When thebandpulley has been moved in so that its rim entirely overlaps thebeveled rim of the fixed pulley, the irictional contact will cause theband-wheel to be revolved with the fixed wheel as though the two weresolid-a single pulley; and the pressure of the friction-blocks againstthe inner side of the band-wheelrim will also assist in increasing thefriction between the two pulleys at their rims. The band-pulley islocked in this position in contact with the fixed pulley by two (ormore, if desired) clampingho0ks, A' A', which are centrally pivoted inbearings B' B'on theinuer side of the bandpulley, with their outercurved ends, C C', projecting through slots DDto the outer side of theband-pulley. The curved outer ends of these hooks are kept normallypressed into contact with the beveled or rounded projecting edge of agrooved collar, l', by springs E', thus holding the inner ends of thehooks normally pressed out, so as to lock the said hooks inside of theannular flange F, which is cast on the inner side of the fixed pulley.The band-pulley is throwninto or out of engagement with the iixed pulleyby a hand-lever, F', which is pivoted to the lower end of a small hangeror bearing, G', which is secured in the lower side of the sleeve N. Thecurved arms H H' at the upper'end of this lever extend around a collar,l', which fits around the outside of the outwardly projecting part ofthe hub of the band-pulley, and which is formed with an annular groove,J', in which tit small pins K' K', which are on the inner side of theends of the arms H' H', as clearly shown in Fig. 4 of the drawings. Theinner end of this grooved collar l is formed with an annularflange-plate, L', which is secured against the outer side of theband-pulley by means of screws or small-headed bolts M', the heads ofwhich do not fit tightly down against the outer side of the said flange,but stand out a short distance, so as to give the said collar and Bangea certain outward movement before the band-pulley is itself moved. Theouter annular edge of this flange-plate is formed with a bead orenlargement, N', against which the outer curved ends of theclampinghooks A' A' are pressed bythe springs E', as before stated. Inoperation, the band-pulley normally stands out of contact with the fixedpulley, as shown in the sectional view Fig. 2 of the drawings, the hub Tof this pulley S being of such length that when it is moved out ofcontact with the fixed pulley the inner end. of its hub Twill extend fora short distance over the inner end of the hub of the fixed pulley,whi1ewhen the belt or band pulley is moved into contact with the xed pulleythe outer end of its hub will still extend over the inner end of thesleeve N, so that the band-pulley can be smoothly and easily moved in orout of engagement without any hitch or stop. When :it is desired to movethe bandpulley into T-frictional contact with the tixed pulley, this isdone by pulling the lower free end ofthe shifting-lever F out,when thebandpulley will be slid in along the sleeve N and the inner end of thehub of the fixed pulley, the inner beveled side of its rim first cominginto contact with the springactuated frictionblocks, which, as beforedescribed, will start the band-wheel easily and gradually without anyjaror shock, so that when its rim comes into contact with the beveled rimof the fixed wheelit will already be in full motion. As the rim of theband-wheel is thus pressed into contact with the rim of the fixed wheel,the rounded inner ends of the clamping-hooks A' A will be pressed pastaround the inner beveled edge of the locking-ring F, the springs E'throwing the hooks into their normal positions as soon as they havepassed this edge; and it will be` seen that by this arrangement as soonas the beveled rims of the two pulleys have been pressed together thespringactuated clamping hooks will have automatically locked the slidingpulley to the fixed pulley. The two pulleys will be thus IOS IIO

held locked together as long as it is desired l when l that thebelt-pulley should revolve.

2. The combination of the fixed pulley having the beveled rim formedwith the openings,

the belt-pulley is to be stopped, this is easily l the pairs of springsformed with the longiand rapidly done by pushing in the handle of ltudinal slots in their bent ends, the wooden the shifting-lever F. Thearms at the inner end of this lever will first act ou the grooved collarl, drawing the same outward as far as the screws M will permit until theflangeof the collar comes against the heads of the said screws, and asthe collar is thusindependently moved the rounded edge of its flangewill raise, force outward the outer ends of the spring-actuatedclamping-hooks A A, thus freeing the inner ends of the said hooks fromthe beveled inner edge of the ring F, as will be readily seen, beforethe belt-pulley has begun to move outward. As the pull of the lever iscontinued, the collar, after moving this short space alone to unlock theclampinghooks, bears against the heads of the screws M .lland thebelt-pulley, being thus unlocked from the fixed pulley,will then easilyslide out along the collar N, so as to free its rim from all contactwith that of the fixed wheel.

From the foregoing description, taken in connection with theaccompanying drawings, the construction, operation, and advantages of myinvention will be readily understood.

It will be seen that by moving the belt-pulley off on the sleeve il thebelt and pulley are entirely stopped when not in use, and as none of theworking parts of the belt-pulley are exposed to any part of themachinery in motion it cannot wear, and, therefore, must always remaintrue; also, by the use of the receding wooden friction-blocks themachinery can be started without any shock and can be put in full motionbefore the belt-pulley comes in contact with the driver or fixed pulley.

The wooden friction-blocks can be readjusted until entirely worn, andthey are the only parts exposed to wear and can be very quickly andcheaply replaced when necessary. As the belt-pulley does not run on theshaft when not in use and the shaft runs not in the said pulley, but inthe sleeve N, the pulley is not so liable to wear loose and will therebyremain .true longer; also, the pulley can be thrown into and out of gearat a higher rate of speed than formerly, owing to the spring-actuatedwooden blocks; also, by applying the friction to the rim of thebeltpulley the amount of friction required is lessened and it isdistributed over a larger surface. The number of friction-blocks may beincreased for larger wheels.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States, is

l. The combination, with the fixed pulley having the beveled rim formedwith the openings, ofthe spring-actuated friction-blocks and the movablebelt-wheel formed with the beveled rim.

frietionblocks,and the movable pulley formed with the beveled rim,substantially as set forth.

3. ln a friction-pulley, the combination of a fixed pulley having aprojecting rim beveled ou its outer side and formed with severalopenings, a movable pulley having a projecting rim beveled on its innerside,and frictionblocks having their ends pressed by springs out throughthe said rim openings of the fixed wheel or pulley.

4. The combination of the fixed pulley having the long hub and thebeveled rim formed with the openings, the spring-actuatedfriction-blocks, the sleeve mounted on the shaft, and the movable pulleyformed with the long hub and the rim beveled on its inner side.

5. The combination ofthe fixed pulley having the long hub and formedwith the locking-ring on its inner side,and `the beveled rim having theopenings, the spring actuated friction -blocks, the sleeve mounted onthe shaft, the movable pulley formed with the long hub, slots, and therim beveled ou its inner side, and the clamping-hooks.

G. The combination ofthe fixed pulley having the long hub and formedwith the locking-ring on its inner side,and the beveled rim having theopenings, the spring -actuated friction blocks, the sleeve mounted on'the shaft, the movable pulley formed with the long hub, the slots, andbearings, and the rim beveled on its inner side, the grooved collarformed with the perforated flange, the screws arranged as described, anda shifting-lever, and the spring-actuated clamping-hooks, substantiallyas set forth.

7. The combination of the fixed pulley having the long hub and formedwith the locking-ring on its inner side, and with the beveled rim havingthe openings, the springactuated friction-blocks, the sleeve mounted onthe shaft and held in place by a ring, and having the aperture near itsend and the oilcup, the movable pulley formed with the long` hub, theslots and bearings, and the rim beveled on its inner side, the groovedcollar formed with the perforated flange, the screws arranged asdescribed, the lever having the pins on the free ends of its arms, andthe spring-actuated clamping-hooks,substantially as set forth.

In testimony thatI claim the foregoing as my own I have hereunto affixedmy signature in presence of two witnesses.

EZRA VESLEY RHONE.

\Vitnesses:

JNO. B. ALLEN, JNO. C. NEARING.

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